.carousel-caption {
  position: absolute;
  right: 15%;
  bottom: 20px;
  left: 15%;
  z-index: 10;
  padding-top: 20px;
  padding-bottom: 20px;
  color: #fff;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .6);
}
.carousel-caption .btn {
  text-shadow: none;
}

/* Since positioning the image, we need to help out the caption */
.carousel-caption {
  z-index: 10;
}

@media (min-width: 768px) {
  .carousel-caption p {
    margin-bottom: 20px;
    font-size: 21px;
    line-height: 1.4;
  }
}